Aperiodic Myopia Control Lens to Limit Retinal Neural Adaptation
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Solution Overview
Problem
Existing optical methods for myopia control, such as defocus spectacle lenses, Ortho-K lenses, and defocus soft contact lenses, face a decline in efficacy over time due to neural adaptation of the retina, as they often have consistent geometric shapes and distributions that lead to small disturbances in vision, causing the retina to adapt and lose control efficiency.
Innovation Solution
A myopia control lens with a control zone featuring aperiodic optical microstructural units that change the incident angle of light, arranged in a tessellated form to create strong optical interference, disrupting the direction of peripheral light and minimizing neural adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional defocus spectacle lenses, OK lenses, or defocus soft contact lenses are used to create peripheral myopic defocus, then myopia control efficacy is achieved initially, but the efficacy declines over time due to neural adaptation of the retina
Solution Approach 1:
The patent applies asymmetry by using aperiodic (non-repeating) arrangements of optical microstructural units in the control zone, rather than symmetric periodic patterns. This creates irregular light distribution that prevents the retina from adapting to predictable patterns, thereby maintaining myopia control efficacy over longer periods. The aperiodic tessellation ensures that light paths vary in unpredictable ways, disrupting neural adaptation mechanisms.
Solution Approach 2:
The patent changes the arrangement parameter from periodic to aperiodic in the control zone. This parameter change transforms the light distribution pattern from regular and predictable to irregular and unpredictable, preventing retinal adaptation while maintaining the optical defocus effect needed for myopia control.
2Ease of manufacture
If optical microstructural units with consistent geometric shapes and distributions are used, then manufacturing is simplified, but the retina adapts quickly causing loss of control efficiency
Solution Approach 1:
The patent applies local quality by making different regions of the control zone have different optical microstructural unit arrangements. The aperiodic arrangement creates local variations in light path and intensity, preventing global retinal adaptation while maintaining manufacturability through standardized unit cells that are simply arranged non-repetitively.
Solution Approach 2:
The patent uses asymmetric aperiodic arrangements of optical microstructural units, breaking the symmetry of conventional periodic designs. This asymmetry prevents the retina from adapting to regular patterns while the units themselves can remain geometrically simple for ease of manufacture.
3Manufacturing precision
If periodic tessellation of graphic units is used in the control zone, then manufacturing precision is easier to achieve, but light interference is weaker allowing neural adaptation
Solution Approach 1:
The patent employs asymmetric aperiodic tessellation of graphic units in the control zone. This breaks the periodic symmetry, creating strong and varying light interference patterns that prevent retinal adaptation. The aperiodic arrangement can still be manufactured with reasonable precision using standard fabrication techniques.
Solution Approach 2:
The patent changes the arrangement parameter from periodic to aperiodic in the control zone tessellation. This parameter change transforms the light interference pattern from weak and predictable to strong and unpredictable, effectively preventing neural adaptation while maintaining manufacturing feasibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The lens design maintains myopia control efficiency by creating anisotropic point spread functions on the retina, reducing neural adaptation and prolonging the effectiveness of myopia management.
Implementation Method 1
the optical microstructural units are used to change the incident angle of light
Implementation Method 2
The control zone of this design can form strong optical interference in the peripheral visual field
Data Source
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AI summary
The present invention relates to the technical field of myopia control, in particular to a myopia control lens and eyeglasses for myopia control. The myopia control lens comprises: a lens substrate, on which a central optical zone and a control zone surrounding the periphery of the central optical zone are arranged; a plurality of optical microstructural units are arranged on the control zone, and the optical microstructural units are arranged in an aperiodic manner in the control zone; the optical microstructural units are used to change the incident angle of light.